Improvement in screw-wrenches



NEIL:

Improvement in Screw Wrenches.

Patented Feb. 134.1872.

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oHAELEs NEIL, 0E TE PPET LANE, SHEFFIELD, AssIeNoE TO FREDERICK BRITTAIN, on ST. GEORGES WORKS, SHEFFIELD, ENGLAND.

IMPROVEMENT IN SCREW-WRENCHESL Specification forming part of Letters Patent No. 123,638, dated February 13, 1872.

Specification describing an Improved Screw-Wrench, invented by CHARLES NEIL, of Trippet Lane, Sheffield, in the county of Yorkshire, England.

Figure 1 represents a face view, and Fig. 2 and edge view of my improved wrench.

Similar letters of reference indicate corresponding parts.

The object of this invention is to improve the form of the parts constituting a screwwrench so as to obtain greater strength, and permit making the jaws and handle of malleable cast-iron. The wrench will thereby be more durable and less expensive than those heretofore in use.

"A in the drawing, represents the head of the Wrench, formed on or attached to the handle B, and carrying the fixed jaw a, and the movable jaw O, the latter being Lshaped, as its shank b is at right angles to the lip cl. The shank b of the movable jaw fits in a slot, which is out diametrically through the head A, and is toothed along its lower edge, to mesh into the threads of a worm, D, hung in the lower part of the head, in a recess provided in the latter. A top, 0, projects from the head under the worm and protects it, the operator taking hold of the worm at the sides for turning it.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent The screw-wrench provided with a recess in its head for the reception of the Worm D, and with a 'moteotinglip, 0, under the worm, substantially as and for the purpose herein shown and described.

The above specification of my invention signed by me this 23d day of August, 1871.

4 CHARLES NEIL.

Witnesses JOSEPH OWEN, JOHN BRAMHALL. 

